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Title: Bogoliubov-Cerenkov Radiation in a Bose-Einstein Condensate Flowing against an Obstacle

Abstract

We study the density modulation that appears in a Bose-Einstein condensate flowing with supersonic velocity against an obstacle. The experimental density profiles observed at JILA are reproduced by a numerical integration of the Gross-Pitaevskii equation and then interpreted in terms of Cerenkov emission of Bogoliubov excitations by the defect. The phonon and the single-particle regions of the Bogoliubov spectrum are, respectively, responsible for a conical wave front and a fan-shaped series of precursors.

Authors:
 [1]; ;  [2];  [2];  [3]
  1. CNR-BEC-INFM, Trento, I-38050 Povo (Italy)
  2. Los Alamos National Laboratory, Los Alamos, New Mexico 87544 (United States)
  3. (Italy)
Publication Date:
OSTI Identifier:
20861534
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 97; Journal Issue: 26; Other Information: DOI: 10.1103/PhysRevLett.97.260403; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BOSE-EINSTEIN CONDENSATION; CHERENKOV RADIATION; EQUATIONS; EXCITATION; MODULATION; PHONONS

Citation Formats

Carusotto, I., Hu, S. X., Collins, L. A., Smerzi, A., and CNR-BEC-INFM, Trento, I-38050 Povo. Bogoliubov-Cerenkov Radiation in a Bose-Einstein Condensate Flowing against an Obstacle. United States: N. p., 2006. Web. doi:10.1103/PHYSREVLETT.97.260403.
Carusotto, I., Hu, S. X., Collins, L. A., Smerzi, A., & CNR-BEC-INFM, Trento, I-38050 Povo. Bogoliubov-Cerenkov Radiation in a Bose-Einstein Condensate Flowing against an Obstacle. United States. doi:10.1103/PHYSREVLETT.97.260403.
Carusotto, I., Hu, S. X., Collins, L. A., Smerzi, A., and CNR-BEC-INFM, Trento, I-38050 Povo. Sun . "Bogoliubov-Cerenkov Radiation in a Bose-Einstein Condensate Flowing against an Obstacle". United States. doi:10.1103/PHYSREVLETT.97.260403.
@article{osti_20861534,
title = {Bogoliubov-Cerenkov Radiation in a Bose-Einstein Condensate Flowing against an Obstacle},
author = {Carusotto, I. and Hu, S. X. and Collins, L. A. and Smerzi, A. and CNR-BEC-INFM, Trento, I-38050 Povo},
abstractNote = {We study the density modulation that appears in a Bose-Einstein condensate flowing with supersonic velocity against an obstacle. The experimental density profiles observed at JILA are reproduced by a numerical integration of the Gross-Pitaevskii equation and then interpreted in terms of Cerenkov emission of Bogoliubov excitations by the defect. The phonon and the single-particle regions of the Bogoliubov spectrum are, respectively, responsible for a conical wave front and a fan-shaped series of precursors.},
doi = {10.1103/PHYSREVLETT.97.260403},
journal = {Physical Review Letters},
number = 26,
volume = 97,
place = {United States},
year = {Sun Dec 31 00:00:00 EST 2006},
month = {Sun Dec 31 00:00:00 EST 2006}
}